Akademik Veri Yönetim Sistemi
Diğer Uluslararası Fon Programları, 2014 - 2017
In order to analyze the leakage flux component for condition monitoring, a comprehensive 2D and 3D finite element analysis has been done through Ansys Maxwell. In addition, an experimental setup was built to test a 0.4kW servo motor under various fault conditions. Several spots around the motor and shaft have been probed to systematically monitor the leakage components. So far we have investigated broken magnet and eccentricity faults in finite element simulation and identified the fault related patterns in flux density spectrum. In the flux spectrum, the fault patterns can be clearly identified which enables separation of healthy and faulty machines. The difference between the leakage flux behind the slot and behind the tooth is also studied and it is shown that the spectrums of the flux collected from these spots are mainly the same results with different amplitudes. This information is very useful in the case of a machine that may saturate the fluxgate sensor. The same scenarios are repeated experimentally to justify the theoretical findings. As shown below, the fault related signatures significantly increase when the motor has broken magnet or demagnetization issues. The tests are conducted under various torque-speed conditions. It is found that the signatures are mostly torque and speed independent which provides a very unique feature for flux based condition monitoring as the user does not need to design an operating point dependent threshold.